三维互穿结构<strong>SiC</strong>晶须骨架增强镁基复合材料制备及其力学性能

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三维互穿结构SiC晶须骨架增强镁基复合材料制备及其力学性能

谷瑞成, 张健, 张明阳, 刘艳艳, 王绍钢, 焦大, 刘增乾, 张哲峰

Fabrication of Mg-Based Composites Reinforced by SiC Whisker Scaffolds with Three-Dimensional Interpenetrating-Phase Architecture and Their Mechanical Properties

GU Ruicheng, ZHANG Jian, ZHANG Mingyang, LIU Yanyan, WANG Shaogang, JIAO Da, LIU Zengqian, ZHANG Zhefeng

图6 经1200℃预氧化处理得到的以纯Mg和AZ91D镁合金为基体的SiCw/Mg复合材料的J积分和相对应的应力强度因子( $K_{J}$ )随 $裂纹扩展长度$ (Δa)的变化曲线(以AZ91D镁合金为基体的复合材料的断裂韧性水平以虚线表示)

Fig.6 Curves of $J$ -integral (a) and $K$ -based fracture toughness ( $K_{J}$ ) (b) with crack extension (Δa) measured by in situ SEM for the SiCw/Mg composites with pure Mg and AZ91D Mg alloy as the matrices corresponding to pre-oxidation temperature of SiCw scaffolds of 1200^oC (The dashed lines indicate the fracture toughness values of the composite with AZ91D Mg alloy as the matrix)